Type-writing machine.



J.C.McLAUGHUN.

TYPE WRITING MACHINE.

APPLICATION FILED APR.30. 1915.

Patented Jan. 9 19.17.

3 SHEETS-SHEET 2.

WJTNESSEm .I. C. McLAUGHLIN.

TYPE WRITING MACHINE.

APPLICATION HLED APR-30. I915.

Patented Jan. 9, 1917.

a SHEETS-SHEET 2.

|NVENTUR:

BY @KZW a single color ribbon; and certain mains idle.

barren s'ra'rns rarnn'r orricn T JOHN C. McLAUGI-ILIN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO 'UNDEEWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

ain tea.

Patented J an. 9, 1917.

Application filed April 30, 1915. Serial No. 24,844. 5

To all whom it may concern:

Be it known that I, JoHN-GfMoLAUGH- LIN, a citizen of the United States, residing in Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in TypelVriting Machines, of which the following is a specification.

This invention relates to ribbon mechanism for typewriting machines in which a ribbon is vibrated over the printing point at each type stroke. The invention may be used with a ribbon having a plurality of color bands or stripes, which may be selectively brought into use; the ribbon mechanism being also settable at a stenciling or non-printing position so that the ribbon re- The invention is designed for use with a machine in which the platen is shiftable to different case positions; Certain features of the invention, however, may be used with the mechanism adapted to a features of the invention may be used in a machine in which a non-shifting platen is employed.

The invention provides an improved arrangement of ribbon vibrating mechanism in which the ribbon vibrator and its actuating lever are supported by a frame or support separate from the platen v shifting frame, and having a connection therewith to cause said support to shift up and down with the platen to different case positions, and thus maintain the ribbon vibrato-r in operative relation to the' platen in both case positions. The actuating lever is carried on said support independently of the universal bar. and has a suitable operating connection with the latter, permitting said lever to shift up and down relatively to the universal bar, while maintaining 1ts operative relation therewith.

To vary the throw of the ribbon vibrator and thereby bring different color bands into activity, a shiftable connection is provided between the actuating lever and the means by which motion is transmitted from said lever to the vibrator, the point of connection being shiftable toward and from the fulcrum of the lever.

A. feature of the invention is the provi sion of positive means for preventing shiftmg of said point of connection during the {operation of the vibrator, thereby insuring the accurate throw of the ribbon to the proper position over the printing point.

The invention further provides improved means for positively preventing operation of the vibrator when the mechanism is set at non-printingposition, said means permitting the actuating lever to swing idly'independently of the vibrator.

In practising the invention, an actuating lever for operating the ribbon vibrator,may be in the form of a bell crank mounted on a frame, shiftable up and down with the platen, said frame mounted on the machine frame and guided vertically thereby in its shifting movements. Said shifting frame may be shifted by a link connecting it to the carriage shift rail. The actuating lever may be mounted to swing about a vertical axis and connected through a link to a toggle comprising links connected at their outer ends respectively to the ribbon vibrator and said vertically shifting frame, whereby the horizontal vibration of the actuating lever is transmitted to the toggle and-effects a vertical vibration of the ribbon vibrator. The actuating lever may be 10- catedbeneath the universalbar and have a pinand-slot connection therewith for transmitting motion from the universal bar to the lever, but permittingthe' lever to shift up and down with the platen independently of the universal .bar. '7 V The link for transmitting motion from the actuating leverto the toggle may be connected to said lever by a connecting pin shiftable in a radial slot in said lever to permit the point of connection tolbe shifted to and from the pivot of the lever, and thereby vary the throw of the ribbon to bring the desired color bandinto use. The shifting of said pin in the slot may be effected by a switch lever slotted to receive the pin and operated by the usual key 'or'keys at the keyboard of the machine. of the connecting pin in its slotv during the operation of the actuating lever is posi tively preventedby a guide plate which may be fixed to said vertically shiftable frame,

andis provided with arc-shaped slots to receive said pin, sald'slots concentric with the actuatinglever fulcrum. Said guide plate further serves as a lock for the switch lever to prevent operation of the ribbon Slllfl).

keys except when the ribbon is innon-print- Accidental shifting ing position. Said guide plate may also provide an intermediate stop surface to positively prevent the vibration of said pin by'its lever when the ribbon shift keys are set to nonprinting position. The actuating lever may be provided with an arc-shaped slot extending laterally from the radial'slot and concentric with the lever .fulcrum to permit the leverto swing idly when the mechanism is setfor non-printing. V

' Otherfeatures and advantages will hereinafter appear.

- In the accompanying drawings, Figure 1 is a sectional side elevation view of an Underwood typewriting machine with the present invention applied thereto, the parts being in their normal position of rest, the

the parts being in their normal position of rest, the platen inthe lower case position, and the ribbon mechanism set for printing with the lower color band. Fig. 4 is a fragmentary front elevation view with the parts in the same position as in Fig. 3. Fig. 5 is a view similar to Fig. 4, but with the ribbon thrown up to operative position over the printing line. Fig. 6 is a perspective view of the vertically shiftable frame. Figs. 7 to .12 inclusive are part sectional planviews, each showing the actuating lever, the guide plate, and the switch lever by which the throw of the ribbon is controlled. Fig. 7 shows the parts; set for printing with the upper color band. Fig. 8shows the parts set at stenciling or non-printing position. Fig.

9 shows the parts set for printing with'the lower color band. Figs. 10,11 and 12 correspond to Figs. 7, 8 and 9respectively, but show the position of the parts assumed Hwhen a type-bar has been thrown'up to the printing point.

. iTypes 15 on type-bars 1 6 are arranged to be swung upwardly and rearwardly about a fulcrum *rodl? tostrike against the front face of the platen 18, by means of keys '19 connected through hell cranks 20 to the typebars. Thepla-ten is mounted in a frame 21 to shift up and down to upper and lower Qcaseposition in the carriage 22. The carriage is mounted to travel on a rear guide rail23, and a front. guide rail, not shown. A'roll 24 on the platen frame runs on a shift rail 25forming part of the platenshift frame 26, which swings on'a'horizontal axis 27, and

may be operated by a shift key and lever 28, 29. The carriage may be driven by the usual spring motor, notshown, and its letter-feed.-

ing movement is controlled by an escapement mechanism comprising an escapement wheel 30, with which cooperate dogs 31 on a dog rocker 32 actuated by a universal .bar 33. Shoulders 34 on the type-bars strike the universal bar at each type-stroke, and move it rearwardly to operate the dogs 31 and ribbon vibrating mechanism. A. pinion connected to drive the'escapement wheel 30, runs in mesh with a rack 36 on the carriage.

The shoulders 34 on the type-bars are preferably formed to move the universal bar durlng a greater portion of the type-stroke than 18 necessary to operate the escapement mechanism, or than is usual in this type of :machlne. That 1s, there is suflicient lost motion between the universal bar and the escapement dogs to permit considerable movement of said bar and the ribbon vibrating mechanism, before said dogs are operated. The throw of the ribbon vibrator is thereby commenced at an early period in the type-stroke, thus aiding in positively positioning the ribbon over the printing point well in advance of the types.

Referrin to Figs. 3 to 6, a ribbon vibrator or guide 3 through which the ribbon is guided and fed in the usual manner, is arranged to be vibrated vertically to a position over the printing line'at each typestroke. The rearward movementof the universal bar at each typestroke is transmitted to an actuating lever or bell crank 38 fulcrumed by means of a pivot screwr39 on a stud 40, (Fig. 6) mounted on a verticallyshiftable frame 41. Said framecomprises vertical guide plates 42 guided on vertical standards 43, fixed to and" forming part of the machine frame. The shiftable. frame 41 is connected throughan arm 44 to the platen shift rail 25, so that said frame is shifted up and down with the platen. The frame 41 is connected to th m-H144. by a horizontal pin 78 passing loosely through an aperture in said arm, which arrangement permits the frame 41 to be supported and guided vertically without any tilting movement while the platen shifting frame 26 swings about its fulcrum 27. r

The connection between the actuating lever 38 and the universal bar comprises a pin projecting vertically upward from the lever and entering a slot 46 in an arm 47 fixed to and offset downwardly from the universal bar frame. This connection permits the actuating lever to be shifted up and down with the platen, and leaves the universal bar entirely free from the weight of the ribbon vibrating mechanism. V V

The connections for transmitting motion from the actuating lever 38 to the ribbon vibrator comprise a vertical pin 48, con

nected to said lever, a link 49 connecting said pm wlth a pintle 50 and a l nk 51 from said pintleto the vibrator The link 51 tween said bar and lever.

substantially double that or the link 75 at its point of connection with the link f9.

Owing to the connection of the toggle link 75 with the shifting frame 41, and also owing to-the fact that the actuating lever 381s mounted on said shiftmg frame, t

will 'be seen that the relative position of the toggle links remains unchanged as the frame ll shifts, up and down with the platen shift rail; The ribbon vibrator 1s consequently shifted up and down with the platen, and its position relative tothe platen is the same for both'case positions. The

Vslot-and-pin connection between the actuatmg lever and the universal bar permltsthe actuating lever to shift with the platen without affecting the operative relation be- The pin 48 eX- tends downwardly a sufficient distance to maintain its operative connection with the switch 55 when the platen is shifted 'up- \vardly. A stop pin 80 positively limits the .throw of the switch 55.

'Variations may be resorted to within the scope of the'invention, and portions of the.

improvements may be used without others' Having thus described my invention, I clann:

1. In a typewriting machine, the combina tion with a platen shiftable to upper and lower case positions, of a ribbon vibrator to vibrate a ribbon over the printing line on V the platen, an actuator operated at each type stroke, a support on which said actuator is mounted, means to shift said support up and down with the platen, a toggle forming a connection between said support and the vibrator, and means cooperating with said toggle to form a driving connection between the actuator andvibrator and also-to cause the vibrator-to shift up and down with said support, and thus maintain a constant rela tion to the platen during the shifting of the,

latter. 7 v

2. In a typewriting machine, the combination with a platen shiftable to upper and lower case positions, of a ribbon vibrator, an actuator therefor, a support on which the actuator is mounted, means for shifting said support with the platen, a toggle" forming a connection between said'support and the'vi- .brator, and means connecting the actuator with the toggle for operating the latter, and

thereby actuating the vibrator, said connectlng means between the toggle and said actuator serving to support the v brator and cause it to shift up and down With the platen. V

3. In a typewriting machine, the combination with a ribbon vibrator, of a pair of links forming a toggle, one end of whichis con jnected to the vibrator, a support to which the other end of'thetoggle is connected, an

actuating lever, alink connecting said leverto the toggle and operated by said lever in a direction transverse to the direction of movement of the vibrator, and means to actuate said lever. r I

4. In a typewritin'g machine, the comb1- nation with a vibrator mounted to move up anddown at each type stroke, of a pair of links forming a toggle connected at one end to the vibrator, a support to which the other end of the toggle is connected at a point below the vibrator, a universal bar operated at veach type stroke, a bell crank forming an actuator for the vibrator, and. swinging transversely to the direction of movement of the vibrator, means to cause said bell crank to be operated by the universal bar,

and a link connecting said bell crank with the toggle.

V 5. Ina front-strike typewriting machine, the combination with a platen shiftable to upper and lower case positions, of a ribbon vibrator mounted to vibrate up and down in. front of the platen to cover the printing point at each type stroke, a universal bar moved vrearwardly at each type stroke, a

supporting frame mounted for up and down movement on the machlne frame, a pa1r of 6. In a typewriting machine, the combination with a platenframe and a platen shift rail for shifting the platen frame to upper and lower case positions, a ribbon vibrator, an actuator therefor, asupporting frame on which said actuator is carried, a toggle connecting said supporting frame and vibrator and operated by said, actuator to actuate the vibrator, said frame being supported and guided onstandards on the machine frame, and a connection between the platen shift rail and said'supporting frame for moving the latter up and down on said standards when the platen: is shifted.

7. In a typewriting machine, the combination with a'ribbon vibrator, of a toggle connected thereto,'an actuating lever, a universal bar connected to vibrate said lever, means formingran operating connection from said lever tothe toggle, and mechanism to shift the point of connection of said means and lever toward and frornvthe fulcrum of the lever to vary the throw of the vibrator.

, 8; In a typewriting'machine, the combina- 131011 with a ribbon vibrator, of an actuating level therefor, a universal connected to vibrate said lever, means forming an operating connection from said lever to the ribbon vibrator, mechanism to shift the point of connection of said means and lever toward and from the fulcrum of the lever to vary the throw of the vibrator, and means to positively prevent the said point of connection shifting toward and from the fulcrum of the lever during the operation of the latter.

9. In a typewriting machine, the combination with a ribbon vibrator, of an actuating lever, a connector between said lever and vibrator, for transmitting the motion of said lever to the vibrator, a connecting pin by which said lever is attached to said connector, said pin shiftable toward and from the fulcrum of the actuating lever to vary the throw of the vibrator, and a stationary guide for said pin by which it is positively guided during the movement of the actuating lever and thereby prevented from shifting toward and from said fulcrum during the throw of the vibrator.

10. The combination with a ribbon vibrator, of an actuating lever therefor, intermediate mechanism for transmitting motion from .the actuating lever to the vibrator, a connecting pin between said lever and said mechanism shiftable toward and from the fulcrum of the actuating lever, and a stationary guide plate having a slot therein in which said pin works during the throw of said lever to prevent said pin from shifting toward or from the fulcrum of said lever during the throw of the vibrator.

11. The combination with a vibrator for a bichrome ribbon, of an actuating lever, means forming a connection between said lever and the vibrator, said means comprising a pin and guiding means on said lever permitting the pin to be shifted toward and from the fulcrum of said lever to thereby vary the throw of the vibrator to bring different color bands into activity, and a guide plate having slots concentric with the fulcrum of said lever, in one or the other of which slots said pin is guided during the vibration of the lever to prevent the pin from moving toward or from said fulcrum.

12. The combination with a vibrator for a bichrome ribbon, of an actuating lever, means forming a connection between said lever and the vibrator, said means comprising a pin and guiding means on said lever permitting the pin to be shifted toward and from the fulcrum of said lever to thereby vary the throw of the vibrator to bring different color bands into activity, a guide plate having slots concentric with the fulcrum of said lever, in one or the other of which slots said pin is guided during the vibration of the lever to prevent the pin from moving toward or from said fulcrum, and a switch to shift said pin from position to copermitting the pin to be shifted toward and from the fulcrum of said lever to thereby vary the throw of the vibrator to bring different color bands into activity, a guide plate having slots concentric with the fulcrum of said lever, in one or the other of which slots said pin is guided during the vibration of the lever to prevent the pin from moving toward or from said fulcrum,

a switch to shift said vpin from position to cooperate with one slot into position to en-v ter the other slot and thereby determine'the throw of the ribbon vibrator, a key or keysv for actuating said switch, and means to yieldingly hold the switch in either of its shifted positions.

1a. The combination with a ribbon vibrator, of an actuating lever, connecting means between said lever and the vibrator for transmitting motion to the latter, said connecting means comprising a pin and a radial slot in said lever along which the pin is shiftable, to vary the throw of the vibrator, and means for locking said pin in its shifted position along the slot to positively pre- Y vent it from shifting during the movement of the said lever and vibrator.-

15. The combination with a ribbon vibrator, of an actuating lever, connecting means between said lever and the vibrator for transmitting motion to the latter, said connecting means comprising a pin and a radial slot in said lever along which the pin is shiftable, to vary the throw of the vibrator, means for locking said pin in its shifted position along the slot to positively prevent it from shifting during the movement of the said lever'and vibrator, and a lateral slot extending from said radial slot and per mitting said lever to be operated without transmitting motion to the vibrator, whereby the ribbon may be silenced.

16. In a typewriting machine, the combi-' nation with a ribbon vibrator, of an-actuating lever therefor, a universal bar connected to operate said lever, and means to transmit motion from said lever to the vibrator to cause thevibrator to vibrate a rlbbon over theprinting point, said means comprising a pin, said lever having a slot along which said pin is shiftable to vary the effective length of the lever arm and thereby vary the throw of the ribbon vibrator tobring different color bands into activity, said lever having also a slot concentric with its fulcrum and uniting with said first-named slot at an intermediate point along the latter,

said arc-shapedslot'holding said pin stationary in an intermediate position and permitting said lever to swing idly, whereby the ribbon is silenced.

17. In 'a'typewriting machine, the combi-' a pin, said leverhaving a slot along which said pin is shiftable to vary the effective length of thelever arm andthereby vary the throw of the ribbon vibrator to bring different color bands into activity, said lever having also a slot concentric with its'ful- ,cruinand uniting with said first-named slot at an intermediate point along the latter, said arc-shaped slot holding said pin stationary in an intermediate position and permitting said lever to swing idly, whereby the ribbon is silenced, and a guide plate having slots in which said pin is guided when 0perated by said lever, said plate also providing an abutment. or stop to positively prevent said pin from swinging with the lever when said pin is set to non-printing position, and thus positively preventing the ribbon vibrator from being thrown to position to carry the ribbon overthe printing point.

18. In ribbon mechanism for a typewritlllg machine, the combination with a bipartite ribbon and avibrator therefor, said vibrator having a variable throw to bring either of a plurality of color bands into activity, of an actuating lever, means operable at each type stroke to actuate said lever, means including a connecting )in on said lever to transmit motion of said lever to the vibrator, means to shift said connecting pin toward and from the fulcrum of the lever to vary the throw of the vibrator \Vlllleilll:

, throw of said lever remains constant, and

a guide in which said pin moves during the movement of the lever to'prevent the pin from shifting toward or from the fulcrum of the lever.

19. In ribbon mechanism. for a typewriting machine, the combination with a ribbon vibrator, of an actuating lever therefor,

means to connect said lever with the actuator, to transmit motion from the lever to the actuator, said means comprising a pin, the lever comprising a guide along which the pin is shiftable toward and from the fulcrum of said lever to vary the effective length of the lever, and a switch lever for shifting the pin, the switch lever being formed with a guide along which the pin is guided as the pin moves with the actuating lever, said guide being concentric with the fulcrum of the actuating lever when the pin is in one operating position, to permit the actuating lever to swing, said switch lever having a second slot concentric with the fulcrum of the actuating lever when the switch is shifted to bring said pin to a different operating position, p

20. In ribbon mechanism fora typewriting machine, the combination with a ribbon vibrator, of an actuating lever therefor, means to connect said lever with the actuator, to transmit motion from the lever to the actuator, said means comprising a pin, the lever comprising a guide along which the pin is shiftable toward and from the fulcrum of said lever to vary the effective length of the lever, a switch lever for shifting the pin, the switch lever being formed with a guide along which the pin is guided as the pin moves with the actuating lever, said guide concentric with the fulcrum of the actuating lever when the pin is in one operating position, to permit the actuating lever to swing, said switch lever having a second slot concentric with the fulcrum of the actuating lever when the switch is shift ed to bring said pin to a different operating position, and a guide plate comprising slots in which said pin is guided and prevented from shifting toward or from the fulcrum of the actuating lever while the latter is in operation with said pin in'either of said operating positiruisr 21. In a typewriting machine, the combination with a ribbon vibrator and a bichrome ribbon vibrated'thereby, of an actii ating lever for operating the vibrator, mechanism for operating said lever through substantially the same angle at each type stroke, means including a connecting pin on said lever to form an'operating connection from said lever to the ribbon vibrator, mechanism to shift said pin toward and from the fulcruinof the lever, to vary the throw of the vibrator and thereby bring different color hands into use, and means whereby said pin may beheld stationary and the lever rotated idly relatively to the pin, so that the ribbon vibrator is silenced.

22. In a typewritin-g machine, the combination with a universal bar operated at each type stroke,'of a ribbon-vibrator, and a connecting train for transmitting motion from the universal bar to the vibrator, for operating the latter, said train comprising a lever and motion-transmitting means normally moving with the lever and having a slotand-pin connection with the lever, said pin adjustable along the slot toward and from the fulcrum of the lever to thereby vary the throw of the vibrator, said lever having an arc-shaped slot concentric with its fulcrum along which said pin may move idly when nation with a universal bar operated at each a ing' point at each type stroke, said connecting train comprising a lever having a radial slot and a pin adjustable along said slot to vary the throw of the vibrator, said pin having positions of adjustment along the slot to bring either color band of the ribbon into activity, means to hold said pin in either position of adjustment along said slot, and an arc-shaped slot formed in said lever and branching from said radial slot at an intermediate point therealong to permit said pin when adjusted to an intermediate position along the radial slot, to be guided along the arc-shaped slot without transmitting motion from the universal bar to the vibrator, whereby the ribbon is silenced.

24. In a typewriting machine, the combination with a universal bar operated at each type stroke, of a ribbon vibrator, a connect- 'ing train from the universal bar to the vibrator to operate the latter, a bichrome ribbon moved by the vibrator to cover the printing point at each type stroke, said con necting train comprising a lever having a radial slot and a pin adjustable along said slot to vary the throw of the vibrator, said pin having positions of adjustment along the slot to bring either color band of the ribbon into activity, means to hold said pin in either position of adjustment along said slot, an arc-shaped slot formed in said lever and branching from said radial slot at an intermediate point therealong to permit said pin when adjusted to an intermediate position along the radial slot, to be guided along the arc-shaped slot without transmitting motion from the universal bar to the vibrator, whereby the ribbon is silenced, and key-controlled means to shift said pin into positions to selectively bring said ribbon bands into activity, or to said intermediate position in which the vibrator is silenced.

25. The combination with a vibrator for a bichrome ribbon, of an actuating lever, means forming a connection betweensaid lever and vibrator, said means comprising a pin, guiding means on the lever permitting the pin to be shifted toward and from the fulcrum of the lever to thereby vary the throw of the vibrator to bring different color bands into activity, and a switch to shift said pin from position to render one color band active to position to render the other color band active, and means cooperating with said switch to hold the pin in either position of adjustment along said guiding means.

26. The combination with a ribbon vibrator, of an actuating lever therefor, means to transmit the motion of the lever to the vibrator, said means comprising a pin adjust- I able along a slot formed in the lever to thereby vary the effective length of the lever and correspondingly to vary the throw of the vibrator, and a switch lever formed with a slot into which said pin extends, said slot in the switch lever comprising a portion concentric with the fulcrum of the actuating lever when the switch is in one position of,

adjustment, and another portion-also concentrio with said fulcrum when the switch is in a difierent position of adjustment, said pin being guided in said slots in the switch lever and moving with the actuating lever when the latter is in operation.

27. The combination with a ribbon vibrator, of an actuating lever therefor, means to transmit the motion of the lever to the vibrator, said means comprising a. pin adjustable along a slot formed in the lever to thereby vary the effective length of the lever and correspondingly to vary the throw of the vibrator, a switch lever formed with a slot into which said pin extends, said slot in the switch lever comprising a portion concentric with the fulcrum of the actuating lever when the switch is in one position of adjustment, and another portion also concentric with said fulcrum when the switch is in a different position of adjustment, said pin being guided in said slots in the switch lever and moving with the actuating lever when the latter is in operation, and a guide plate formed with guiding slots concentric with the fulcrum of the actuating lever and along which the said pin is guided during the movement of said actuating lever.

28. The combination with a ribbon vibrator and an actuating lever therefor, of means for transmitting the motion of said lever to the vibrator, said means comprising a pin adjustable along a slot formed in an arm of said lever to vary the effective length of the lever arm, aswitch lever pivoted eccentrically of said actuating lever and formed with a slot into which said. pin extends, whereby the movement of the switch lever about its fulcrum moves said pin toward or from the fulcrum of the actuating lever, and a guide along which said pin mov during the 5 movement of the actuating lever and whereby said pin is positively prevented from shifting toward or from the fulcrum of the actuating lever as the latter operates, said pin also moving in the slot in said switch 1 lever during the operation of the actuating lever, and locking the switch against move ment except when the pin is beyond the control of said guide.

29. The combination with a bichrome rib bon and a vibrator therefor, of anactuating lever having a radial slot therein, a pin adjustable along said slot, means to transmit the motion of said lever and pin to the vibrator, means for adjusting said pin along to the vibrator.

said.slot to positively prevent motion fronr being transmitted from the actuating lever 30. In a typewriting machine, the combination with a ribbon vibrator, of a palr of links forming a toggle, a pin pivotally con nectingthe upper end of said toggle to the vibrator, a stationary guide provided with a vertical slot to receive said pin and by which the vibrator is vertically guided, and a sup port beneath the vibrator and to which the lower end of the toggle is connected. 7

31. in typewriting machine, the combi nation with a ribbon vibrator, of a pair of links formin a to le a pin )ivotall 7 con- 23 DO 9 V1 necting the-upper end of said toggle to the vibrator, a stationary guide provided with a vertical slot to receive said pin, and by which-the vibrator is vertically guided, a

' support beneath the vibrator and to which the lower end of the toggle is connected; an

' actuating lever, a link connecting said lever to the toggle and operated by the lever in a direction transverse to "the movement of the vibrator, and means to operate said lever.

32. In a .typewriting machine, the combination with a ribbon vibrator, of an actuating lever, connecting means between said lever and vibrator for transmitting the motion of said lever to thevibrator, said means comprising a connecting pin shiftable on said lever toward and from the fulcrum of the lever to different positions of adjustment to thereby vary the throw of the vibrator, and guides for said pin stationary during the movement of said lever and by which said pin is positively guided during the movements of the lever while the pin is in either of said positions, whereby said pin is prevented from shifting toward or from said fulcrum during the throw of the vibrator; 1 V

33. In a typewritingmachine, the combination with a ribbon vibrator, of an actuating lever, connecting means between said lever and vibrator fortransmitting the motion of said lever to the vibrator, said means comprising a connecting pin shiftable on said lever toward and from the fulcrum of the lever to difierent positions of adjustment to thereby vary the throw of the vibrator, guides for said pin stationary during the movement of said lever and by which said pin is positively guided during the movements of the lever while the pin is in either of said positions, whereby said pin is prethe'vibrator, and means tohold said pin stationary in one position and permit the lever to vibrate idly, whereby the ribbon vibrator is silenced. V V

, The Combination with a'vibrator for a bichrome ribbon, of an actuating lever, means forming a connection between said lever andthe vibrator, said means comprising a pin and guiding means on said lever permitting the pin to be shifted toward and from the fulcrum of said lever to thereby vary the throw of the vibrator to bring different color bands into activity, and guides concentric with the lever fulcrum by which the pin is prevented from moving toward or from said fulcrum during the operation of the lever. I

36. In a front-strike typewriting machine, the combination with a platen, of a universal bar having a. forward and rearward movement, a ribbon vibrator having up-and-down movement, a bell crank forming an actuator for the vibrator, said bell crank comprising an arm extending laterally from its pivot and connected to the universal bar at one side of said pivot, said bell crank comprising a forwardly and rearwardly extending arm to which a transverse movement is imparted by the universal bar, and means connecting said last-mentioned arm of the bell crank ith the vibrator for actuating the vibrator. 37. In a front-strike typewriting machine, the combination with a platen, of a universal bar having a forward and rearward movement, a ribbon vibrator having up-and-down movement, a bell crank forming an actuator for the vibrator, said bell crank comprising an arm extending laterally from its pivot and connected to the universal bar at one side of said pivot, said bell crank comprising a forwardly and rearwardly extending arm to which a transverse movement is imparted by the universal bar, a toggle con nected with the vibrator, the members of said toggle arranged to swing in an upright plane substantially parallel with the platen axis, and'an operating link connecting the toggle with said last-mentioned arm of the bell crank for actuating the toggle and thereby moving the ribbon vibrator up and down.

38. In a' typewriting machine, the combination with a universal bar; of a ribbon vibon vibrator to actuate the latter, and anbrator; a toggle; an operating connectionto a base for the toggle support in the frame of the toggle from the universal bar; a support the machine; and means on said base to 10 for the toggle beloW- the universal bar, one guide and hold the toggle support in the arm of the toggle being connected to the ribcase-shifting operations.

- JOHN C. MoLAUGI-ILIN.

' other arm of the toggle being pivoted to the Witnesses:

toggle support; a platen; means for shifting W. O. WESTPHAL, the toggle support in unison with the platen; F. E. ALEXANDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. 0.? 

